论文标题
银河系的螺旋臂切线目录（银河纵向）以银河系的方式和基于各种手臂切线的年龄梯度
Catalog of spiral arm Tangents (Galactic Longitudes) in the Milky Way, and the Age Gradient based on various arm tangents
论文作者
论文摘要
自1980年以来，螺旋臂（在银河纵向）上观察到的205个有更新的目录。这代表了6年内（自2016年以来）增加80个ARM切线。大多数手臂切线都在无线电制度的望远镜上观察到。在这项研究中，分析了每个手臂示踪剂与尘埃通道的分离，以使相对速度从尘埃巷（年龄梯度）远离。观察到每个手臂示踪剂都与尘埃巷分开，显示了整个螺旋臂的年龄梯度约为11.3 +/- 2 Myr/kpc；这使相对速度远离了约87 +/- 10 km/s的防尘车道。
An updated catalog of 205 observed tangents to the spiral arms (in Galactic longitudes) since 1980 is presented. This represents an addition of 80 arm tangents in 6 years (since 2016). Most arm tangents are observed at telescopes in the radio regime. In this study, the separation of each arm tracer from the dust lane is analyzed to obtain the relative speed away from the dust lane (an age gradient). Each arm tracer is observed to be separated from the dust lane, showing an age gradient of about 11.3 +/- 2 Myr/kpc across the spiral arm; this gives a relative speed away from the dust lane of about 87 +/- 10 km/s.
